An analysis model of crack growth was established by means of boundary element method(BEM)

which was used to simulate the crack growth behavior of a powder metallurgy(PM) superalloy

FGH95.The calculation results show that

the predicted life of crack propagation is in good agreement with the experimental data

and the model is veracious and feasible.Then the model was developed to analyze the damage tolerance characteristic of PM turbine disk containing defects

and the predicted crack propagation life was also given.It indicates that the BEM could be used to estimate the crack growth characteristic of complicated component effectively in engineering analyses

and also give a more reasonable value as compared with conventional life prediction method.